PARR

CALORIMETRIC CHEMICALS-NAMELY, BENZOIC ACID [ , POTASSIUM PERCHLORATE, BARIUM CHLORIDE, AND SODIUM PEROXIDE ] FOR USE AS CATALYSTS OR REAGENTS

LABORATORY INSTRUMENTS AND APPARATUS-NAMELY, CALORIMETERS, CALORIMETER CONTROLLERS, AND CALORIMETRIC THERMOMETERS; COMBUSTION BOMBS (IN THE NATURE OF A CHAMBER), AND IGNITORS THEREFOR; PRESSURE REACTORS FOR CONDUCTING CHEMICAL REACTIONS AND TESTS AT ELEVATED TEMPERATURES AND PRESSURES, HYDROGENATORS, AUTOCLAVES, AND TEMPERATURE CONTROLLERS THEREFOR; [ APPARATUS FOR INDICATING THE MELTING POINT OF SUBSTANCES; TURBIDIMETERS; ] AND PARTS FOR SAID LABORATORY INSTRUMENTS AND APPARATUS